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ISO 28721-2:2025

Vitreous and porcelain enamels - Glass-lined apparatus for process plants - Part 2: Designation and specification of resistance to chemical attack and thermal shock
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This document specifies requirements for the resistance of chemical enamels to chemical attack and thermal shock, as well as their designation, for ordering purposes.

It is applicable to enamels used in glass-lined apparatus, piping and other components, primarily used in process equipment in chemical plants, which are applied on to low-alloy carbon steels substrates.

NOTE            The main criteria for assessing enamel quality are its resistance to chemical attack and thermal shock, and the structure of the cover coat enamel.

SDO ISO: International Organization for Standardization
Document Number ISO 28721
Publication Date April 1, 2026
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 107
Publish Date Document Id Type View
April 1, 2026 ISO 28721-2:2025 Revision
Dec. 1, 2015 ISO 28721-2:2015 Revision